University of Groningen, University Medical Center Groningen, Center for Human Movement Sciences, Groningen, the Netherlands.
University of Groningen, University Medical Center Groningen, Center for Human Movement Sciences, Groningen, the Netherlands; Loughborough University, Peter Harrison Centre for Disability Sport, School of Sport, Exercise & Health Sciences, Loughborough, United Kingdom.
Appl Ergon. 2022 Oct;104:103830. doi: 10.1016/j.apergo.2022.103830. Epub 2022 Jun 22.
A new wheelchair tennis hand rim was developed, having a larger contact area and higher friction. How does this new hand rim compare to a regular hand rim regarding submaximal propulsion with a tennis racket during practice in novices? Twenty-four able-bodied novices (12 Regular Rim, 12 New Rim) completed a one-day experiment: pre-test, three practice-sessions and a post-test of 3 × 4 min each on a wheelchair ergometer (1.11 m/s, 7W). The New Rim group compared to the Regular Rim group, had a lower negative work per cycle (-0.83J vs. -2.06J, p = 0.01) at the post-test. There was a significantly larger increase in mechanical efficiency between the pre- and post-test in the New Rim group (2.3-3.4% vs. 2.1-2.5%, p = 0.02) compared to the Regular Rim group. The new rim led to a more ergonomic propulsion technique, with a reduction in negative power and higher mechanical efficiency between the pre- and post-test at submaximal propulsion.
研制出一种新型轮椅网球拍手缘，具有更大的接触面积和更高的摩擦力。与普通手缘相比，在新手练习时使用网球拍进行亚最大推进时，这种新型手缘如何？24 名健全新手（12 名普通手缘，12 名新手缘）完成了为期一天的实验：预测试、三次练习和轮椅测功计上的后测试（1.11 m/s，7W），每次 3 分钟×4 分钟。与普通手缘组相比，新手缘组在后测试中每个周期的负功更低（-0.83J 对-2.06J，p = 0.01）。与普通手缘组相比，新手缘组在预测试和后测试之间的机械效率显著提高（2.3%-3.4%对 2.1%-2.5%，p = 0.02）。与普通手缘相比，新型手缘在亚最大推进时可实现更符合人体工程学的推进技术，降低负功率并提高机械效率。
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